The Duke and Duchess of Sussex made the announcement on their Instagram account on Wednesday alongside an adorable photo of the newborn with his grandparents the Queen, Prince Philip and Meghan’s mum Doria.

The caption read: ‘The Duke and Duchess of Sussex are pleased to announce they have named their first born child: Archie Harrison Mountbatten-Windsor.

‘This afternoon Their Royal Highnesses introduced Her Majesty The Queen to her eighth great-grandchild at Windsor Castle. The Duke of Edinburgh and The Duchess’ mother were also present for this special occasion.’

Archie will not be a prince, yet, and as the first born son of a duke, he could have become an Earl, or even a Lord, but instead he will be Master Archie Mountbatten-Windsor.

The Queen couldn’t stop beaming over her new grandson (Picture: SussexRoyal/Instagram)